Astronomers have carried out a groundbreaking photometric examine on the peculiar W UMa-type binary system known as CSS J003106.8+313347. The examine, revealed on the preprint server arXiv on July 27, gives new insights into the properties of this technique.
W Ursae Majoris-type (W UMa-type) binaries, also referred to as EWs, are eclipsing binaries with quick orbital durations lasting lower than a day. These methods include two dwarf stars with related temperature and luminosity, sharing a standard envelope and being involved with one another. Consequently, they’re generally known as “contact binaries.”
CSS J003106.8+313347, situated roughly 4,900 gentle years away, is an EW with an obvious magnitude of 14.73. The estimated orbital interval of the system is round 0.344 days.
As a result of restricted data is offered about CSS J003106.8+313347, a group of astronomers led by Ehsan Paki from the Binary Programs of South and North (BSN) venture determined to conduct an in depth investigation utilizing a personal observatory in Toulon, France. They noticed the binary on two nights in late 2022 and obtained practically 300 pictures.
Of their paper, the researchers acknowledged, “We carried out the primary photometric examine of the CSS J003106.8+313347 W Ursae Majoris (W UMa)-type system based mostly on ground-based observations.”
Via their observations, the scientists decided that the first star of CSS J003106.8+313347 has an efficient temperature of 5,477 Okay, whereas the secondary star is barely hotter at 5,798 Okay. This discovering means that the first and secondary stars have spectral varieties G8 and G5, respectively.
In accordance with the examine, the first star within the CSS J003106.8+313347 system has a radius of roughly 1.29 instances that of the Solar and a mass of roughly 1.67 instances that of the Solar. The star’s luminosity was measured to be 1.35 instances that of the Solar.
As for the secondary element, it was discovered to have a radius of round 1.09 instances that of the Solar and a mass of about 1.17 instances that of the Solar. The luminosity of this star was decided to be at a stage of 1.22 instances that of the Solar.
The Hertzsprung–Russell (HR) diagram of CSS J003106.8+313347 signifies that the first star is situated above the terminal-age fundamental sequence (TAMS), whereas the secondary star falls between the zero-age fundamental sequence (ZAMS) and TAMS. The astronomers famous that this commentary is per present theories explaining the evolution of binary stars.
The observations additionally revealed that the orbital angular momentum of CSS J003106.8+313347 is 52.08. Primarily based on the brand new outcomes, the researchers concluded that the system is an overcontact binary.
Extra data: Ehsan Paki et al, The First Photometric Research of the Binary System CSS J003106.8+313347, arXiv (2023). DOI: 10.48550/arxiv.2307.15132
Journal data: arXiv
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Quotation: Analysis investigates eclipsing binary CSS J003106.8+313347 (2023, August 7) retrieved 7 August 2023 from https://phys.org/information/2023-08-eclipsing-binary-css-j0031068313347.html
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